From http://www.mediawiki.org/wiki/Thread:VisualEditor/Feedback/Problem_with_using_shift%2B
"Hi. I have been using the visual editor for a while on ar Wikipedia, it is very nice and smooth for fast edits. However, I am facing a very strange problem when I need to add some Arabic diacritics known as tashkil; when I press shift+diacritic button (like x, e, or z) the letter I pressed starts to repeat itself endlessly, and it can only be stopped by refreshing the page and wasting the work I have did. Any thoughts?"
Version: unspecified
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=50631